Don't listen to all the snobbery. An old CB650 would be a fine learner's bike. They had decent brakes and very linear power delivery.
However it appears that a lot of people who have these old Japanese bikes gathering dust are living in some sort of dreamland. They seem to think that the ridiculously high resale on old HDs somehow transfers to their old lackluster bikes. An old CB650, not a particularly popular bike at any time, isn't worth much. Even new it wasn't much more than $1650. I wouldn't pay more than $700-800 for it. Many parts are completely unavailable now. Federal law only requires importers to provide parts for 7 years, I believe.
However it appears that a lot of people who have these old Japanese bikes gathering dust are living in some sort of dreamland. They seem to think that the ridiculously high resale on old HDs somehow transfers to their old lackluster bikes. An old CB650, not a particularly popular bike at any time, isn't worth much. Even new it wasn't much more than $1650. I wouldn't pay more than $700-800 for it. Many parts are completely unavailable now. Federal law only requires importers to provide parts for 7 years, I believe.